| 摘要 |
PURPOSE:To obviate the production of large noise on the read head coil side by providing a phase shift circuit between write circuits and an oscillator and obviating mutual coinciding of the phases of the AC bias signals to be supplied to write head coils. CONSTITUTION:A phase shift circuit 4 is provided between an oscillator 1 which supplies AC bias signals and plural write circuits 2-1, 2-2... so that the phases of the AC bias signals to be supplied to write head coils 3-1, 3-2... via respective write circuits from the phase shift circuit 4 are so deviated as not to mutually coincide with supply lines P1 and P2, P2 and P3..., whereby the noises being induced in the read coils may be considerably reduced. |
